Quantitative Aptitude - Arithmetic Ability Questions

If P/Q = R/S = T/U = 3/4 is (4P + 5R + 7T) : (3Q + 4S + 7U)?

Reflection of the point (2,-4) in the origin is

A thief is stopped by a policeman from a distance of 250 metres. When the policeman starts the chase, the thief also starts running. Assuming the speed of the thief as 5 km/h and that of police man as 7 km/h, how far the thief would have run, before he is over ­taken?

If 5x + 6(3-2x) = 4, then what is the value of x?

If 17/3 + [3(2x - 5/3)]/2 = 1/6, then what is the value of x?

A person loses 75% of his money in the first bet, 75% of the remaining in the second and 75% of the remaining in the third bet and returns home with Rs. 2 only. His initial money was

Two numbers are 35% and 50% lesser than a third number. By how much percent is the second number to be enhanced to make it equal to the first number? 

Marked price of an article is Rs 520 and selling price is Rs 384.8. What is the discount percentage?